[Android] Incorporate findbugs into android builds.

components/cronet/android/test/src/org/chromium/net/CronetTestActivity.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Environment;
 import android.util.Log;
 
+import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.net.urlconnection.CronetURLStreamHandlerFactory;
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 
 import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
 import java.util.HashMap;
 
 /**
  * Activity for managing the Cronet Test.
  */
+@SuppressFBWarnings("URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
 public class CronetTestActivity extends Activity {
     private static final String TAG = "CronetTestActivity";
 
     public static final String COMMAND_LINE_ARGS_KEY = "commandLineArgs";
     public static final String POST_DATA_KEY = "postData";
     public static final String CONFIG_KEY = "config";
     public static final String LIBRARY_INIT_KEY = "libraryInit";
     /**
       * Skip library initialization.
       */
     public static final String LIBRARY_INIT_SKIP = "skip";
 
     /**
       * Initialize Cronet Async API only.
       */
     public static final String LIBRARY_INIT_CRONET_ONLY = "cronetOnly";
 
     public CronetURLStreamHandlerFactory mStreamHandlerFactory;
     public UrlRequestContext mUrlRequestContext;
     HttpUrlRequestFactory mRequestFactory;
+    @SuppressFBWarnings("URF_UNREAD_FIELD")
     HistogramManager mHistogramManager;
 
     String mUrl;
 
     boolean mLoading = false;
 
     int mHttpStatusCode = 0;
 
     class TestHttpUrlRequestListener implements HttpUrlRequestListener {
         public TestHttpUrlRequestListener() {
@@ skipping 132 matching lines @@
     public void startNetLog() {
         mRequestFactory.startNetLogToFile(
                 Environment.getExternalStorageDirectory().getPath()
                         + "/cronet_sample_netlog.json");
     }
 
     public void stopNetLog() {
         mRequestFactory.stopNetLog();
     }
 }